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-rw-r--r--libc/string/nds32/Makefile13
-rw-r--r--libc/string/nds32/memcpy.S88
-rw-r--r--libc/string/nds32/memset.S66
3 files changed, 167 insertions, 0 deletions
diff --git a/libc/string/nds32/Makefile b/libc/string/nds32/Makefile
new file mode 100644
index 000000000..0a95346fd
--- /dev/null
+++ b/libc/string/nds32/Makefile
@@ -0,0 +1,13 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
+#
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+
+top_srcdir:=../../../
+top_builddir:=../../../
+all: objs
+include $(top_builddir)Rules.mak
+include ../Makefile.in
+include $(top_srcdir)Makerules
diff --git a/libc/string/nds32/memcpy.S b/libc/string/nds32/memcpy.S
new file mode 100644
index 000000000..4f285b5ee
--- /dev/null
+++ b/libc/string/nds32/memcpy.S
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sysdep.h>
+!==========================================================
+! void *memcpy(void *dst, const void *src, int n);
+!
+! dst: $r0
+! src: $r1
+! n : $r2
+! ret: $r0 - pointer to the memory area dst.
+!==========================================================
+.weak memcpy
+ENTRY(memcpy)
+ move $r5, $r0
+ beq $r0, $r1, .Lquit_memcpy
+ beqz $r2, .Lquit_memcpy
+ srli $r3, $r2, #5 ! check if len < cache-line size 32
+ beqz $r3, .Lword_copy_entry
+ andi $r4, $r0, #0x3 ! check byte-align
+ beqz $r4, .Lunalign_word_copy_entry
+
+ addi $r4, $r4, #-4
+ abs $r4, $r4 ! check how many un-align byte to copy
+ sub $r2, $r2, $r4 ! update $R2
+
+.Lunalign_byte_copy:
+ lbi.bi $r3, [$r1], #1
+ addi $r4, $r4, #-1
+ sbi.bi $r3, [$r0], #1
+ bnez $r4, .Lunalign_byte_copy
+ beqz $r2, .Lquit_memcpy
+
+.Lunalign_word_copy_entry:
+ andi $r3, $r0, 0x1f ! check cache-line unaligncount
+ beqz $r3, .Lcache_copy
+
+ addi $r3, $r3, #-32
+ abs $r3, $r3
+ sub $r2, $r2, $r3 ! update $R2
+
+.Lunalign_word_copy:
+ lmw.bim $r4, [$r1], $r4
+ addi $r3, $r3, #-4
+ smw.bim $r4, [$r0], $r4
+ bnez $r3, .Lunalign_word_copy
+ beqz $r2, .Lquit_memcpy
+
+ addi $r3, $r2, #-32 ! to check $r2 < cache_line, than go to .Lword_copy
+ bltz $r3, .Lword_copy_entry
+.Lcache_copy:
+ srli $r3, $r2, #5
+ beqz $r3, .Lword_copy_entry
+ pushm $r6, $r13
+.L3:
+ lmw.bim $r6, [$r1], $r13
+ addi $r3, $r3, #-1
+ smw.bim $r6, [$r0], $r13
+ bnez $r3, .L3
+ popm $r6, $r13
+
+.Lword_copy_entry:
+ andi $r2, $r2, #31
+ beqz $r2, .Lquit_memcpy
+ srli $r3, $r2, #2
+ beqz $r3, .Lbyte_copy
+.Lword_copy:
+ lmw.bim $r4, [$r1], $r4
+ addi $r3, $r3, #-1
+ smw.bim $r4, [$r0], $r4
+ bnez $r3, .Lword_copy
+ andi $r2, $r2, #3
+ beqz $r2, .Lquit_memcpy
+
+.Lbyte_copy:
+ lbi.bi $r3, [$r1], #1
+ addi $r2, $r2, #-1
+ sbi.bi $r3, [$r0], #1
+ bnez $r2, .Lbyte_copy
+
+.Lquit_memcpy:
+ move $r0, $r5
+ ret
+
+END(memcpy)
+libc_hidden_def(memcpy)
diff --git a/libc/string/nds32/memset.S b/libc/string/nds32/memset.S
new file mode 100644
index 000000000..edd15a410
--- /dev/null
+++ b/libc/string/nds32/memset.S
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 1998, 2003 Free Software Foundation, Inc.
+ * Contributed by Philip Blundell <philb@gnu.org>
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA.
+ */
+
+#include <features.h>
+#include <sysdep.h>
+!==========================================================
+! void *memset(void *dst, int val, int len);
+!
+! dst: $r0
+! val: $r1
+! len: $r2
+! ret: $r0 - pointer to the memory area dst.
+!==========================================================
+.weak memset
+ENTRY(memset)
+ move $r5, $r0 ! Return value
+ beqz $r2, .Lend_memset ! Exit when len = 0
+ srli $r3, $r2, 2 ! r3 is how many words to copy
+ andi $r2, $r2, 3 ! How many bytes are less than a word
+ beqz $r3, .Lbyte_set ! When n is less than a word
+
+ ! set r1 from to abababab
+ andi $r1, $r1, 0x00ff ! r1 = 000000ab
+ slli $r4, $r1, 8 ! r4 = 0000ab00
+ or $r1, $r1, $r4 ! r1 = 0000abab
+ slli $r4, $r1, 16 ! r4 = abab0000
+ or $r1, $r1, $r4 ! r1 = abababab
+
+.Lword_set:
+ addi $r3, $r3, -1 ! How many words left to copy
+ smw.bim $r1, [$r5], $r1 ! Copy the word to det
+ bnez $r3, .Lword_set ! Still words to set, continue looping
+ beqz $r2, .Lend_memset ! No left byte to set
+
+.Lbyte_set:
+ ! Less than 4 bytes left to set
+ addi $r2, $r2, -1 ! Decrease len by 1
+ sbi.p $r1, [$r5], 1 ! Set data of the next byte to r1
+ bnez $r2, .Lbyte_set ! Still bytes left to set
+
+.Lend_memset:
+ ret
+
+END(memset)
+libc_hidden_def(memset)